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Income Taxes - Narrative Tax Carryforwards (Details) $ in Millions	Dec. 31, 2019 USD ($)
State and Local Jurisdiction [Member]
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	$ 50.1
Downers Grove National Bank [Member]
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	$ 7.3

X

- Definition

Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32559-109319

+ Details

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Balance Type:	debit
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
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Balance Type:
Period Type: